Barnard c
A confirmed exoplanet orbiting Barnard's star.
Compared with Earth
- Mass
- About 34% of Earth's mass.
- Temperature
- About 127 °C (260 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Year
- A year here lasts about 4.1 Earth days.
Planet
- Radius
- Unknown
- Mass
- 0.335 × Earth
- Density
- Unknown
- Equilibrium temperature
- 400 K
- Starlight received
- Unknown
- Orbital period
- 4.124 days
- Average distance from its star
- 0.0274 AU
Star
- Host star
- Barnard's star
- Spectral class
- M — red dwarf
- Surface temperature
- 3,195 K
- Radius
- 0.185 × Sun
- Mass
- 0.162 × Sun
- Age
- Unknown
System
- Distance from Earth
- 5.957 light-years (1.827 parsecs)
- Stars in system
- 1
- Known planets
- 4
Discovery
- Year
- 2025
- Method
- Radial Velocity
- Facility
- Gemini Observatory
Data from the NASA Exoplanet Archive, synced October 14, 2026.